Construction in GCLC language
dim 120 120
point C 110 40
point H_{a} 80 40
point H_{b} 89.36 77.83
color 220 0 0
fontsize 11
cmark_b C
cmark_b H_{a}
cmark_rt H_{b}
color 0 0 0
fontsize 10
% DET: points C and H_{a} are not the same
% Constructing a line a which passes through point C and point H_{a}
line a C H_{a}
color 200 200 200
drawline a
color 0 0 0
% DET: points C and H_{b} are not the same
% Constructing a line b which passes through point C and point H_{b}
line b C H_{b}
color 200 200 200
drawline b
color 0 0 0
% Constructing a line h_{a} which is perpendicular to line a and which passes through point H_{a}
perp h_{a} H_{a} a
color 200 200 200
drawline h_{a}
color 0 0 0
% NDG: lines h_{a} and b are not parallel% DET: lines h_{a} and b are not the same
% Constructing a point A which belongs to line h_{a} and line b
intersec A h_{a} b
cmark_t A
% Constructing a line h_{b} which is perpendicular to line b and which passes through point H_{b}
perp h_{b} H_{b} b
color 200 200 200
drawline h_{b}
color 0 0 0
% NDG: lines h_{b} and a are not parallel% DET: lines h_{b} and a are not the same
% Constructing a point B which belongs to line h_{b} and line a
intersec B h_{b} a
cmark_b B
drawsegment A B
drawsegment A C
drawsegment B C
% Non-degenerate conditions: lines h_{b} and a are not parallel; lines h_{a} and b are not parallel
% Determination conditions: lines h_{b} and a are not the same; lines h_{a} and b are not the same; points C and H_{b} are not the same; points C and H_{a} are not the same